Skiff and Sloop

Skiff noun - Any of various small boats propelled by oars or by sails or by a motor.

Sloop and skiff are semantically related In some cases you can use "Sloop" instead a noun "Skiff".

Sloop noun - A sailing vessel with a single mast set about one third of the boat's length aft of the bow.

Skiff and sloop are semantically related in vehicle for water travel topic. You can use "Skiff" instead a noun "Sloop", if it concerns topics such as boat propelled with wind by sailcloth.